40566913 has 4 divisors (see below), whose sum is σ = 42953220. Its totient is φ = 38180608.

The previous prime is 40566893. The next prime is 40566923. The reversal of 40566913 is 31966504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32455809 + 8111104 = 5697^2 + 2848^2 .

It is a cyclic number.

It is not a de Polignac number, because 40566913 - 2⁹ = 40566401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40566923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1193128 + ... + 1193161.

It is an arithmetic number, because the mean of its divisors is an integer number (10738305).

Almost surely, 2^40566913 is an apocalyptic number.

It is an amenable number.

40566913 is a deficient number, since it is larger than the sum of its proper divisors (2386307).

40566913 is a wasteful number, since it uses less digits than its factorization.

40566913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386306.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 40566913 is about 6369.2160428109. The cubic root of 40566913 is about 343.6032952830.

The spelling of 40566913 in words is "forty million, five hundred sixty-six thousand, nine hundred thirteen".